diff options
Diffstat (limited to 'plugins/wimax/msg_fpc.c')
| -rw-r--r-- | plugins/wimax/msg_fpc.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/plugins/wimax/msg_fpc.c b/plugins/wimax/msg_fpc.c new file mode 100644 index 0000000000..606128b2cb --- /dev/null +++ b/plugins/wimax/msg_fpc.c @@ -0,0 +1,190 @@ +/* msg_fpc.c + * WiMax MAC Management FPC Message decoder + * + * Copyright (c) 2007 by Intel Corporation. + * + * Author: John R. Underwood <junderx@yahoo.com> + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1999 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +/* Include files */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "moduleinfo.h" + +#include <gmodule.h> +#include <epan/packet.h> +#include <epan/prefs.h> +#include "crc.h" +#include "wimax_tlv.h" +#include "wimax_mac.h" + +extern gint man_ofdma; + +/* Forward reference */ +void dissect_mac_mgmt_msg_fpc_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static gint proto_mac_mgmt_msg_fpc_decoder = -1; + +static gint ett_mac_mgmt_msg_fpc_decoder = -1; + +/* Setup protocol subtree array */ +static gint *ett[] = +{ + &ett_mac_mgmt_msg_fpc_decoder, +}; + +/* FPC fields */ +static gint hf_fpc_message_type = -1; +static gint hf_fpc_number_of_stations = -1; +static gint hf_fpc_basic_cid = -1; +static gint hf_fpc_power_adjust = -1; +static gint hf_fpc_power_measurement_frame = -1; +static gint hf_fpc_invalid_tlv = -1; + +/* FPC fields display */ +static hf_register_info hf[] = +{ + { + &hf_fpc_message_type, + { + "MAC Management Message Type", "wimax.macmgtmsgtype.fpc", + FT_UINT8, BASE_DEC, NULL, 0x0, + "", HFILL + } + }, + { + &hf_fpc_basic_cid, + { + "Basic CID", "wimax.fpc.basic_cid", + FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL + } + }, + { + &hf_fpc_invalid_tlv, + { + "Invalid TLV", "wimax.fpc.invalid_tlv", + FT_BYTES, BASE_HEX, NULL, 0, "", HFILL + } + }, + { + &hf_fpc_number_of_stations, + { + "Number of stations", "wimax.fpc.number_stations", + FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL + } + }, + { + &hf_fpc_power_adjust, + { + "Power Adjust. Signed change in power level (incr of 0.25dB) that the SS shall apply to its current power setting", "wimax.fpc.power_adjust", + FT_FLOAT, BASE_DEC, NULL, 0x0, "", HFILL + } + }, + { + &hf_fpc_power_measurement_frame, + { + "Power measurement frame. The 8 LSB of the frame number in which the BS measured the power corrections referred to in the message", "wimax.fpc.power_measurement_frame", + FT_INT8, BASE_DEC, NULL, 0x0, "", HFILL + } + } +}; + + +/* Register Wimax Mac Payload Protocol and Dissector */ +void proto_register_mac_mgmt_msg_fpc(void) +{ + if (proto_mac_mgmt_msg_fpc_decoder == -1) { + proto_mac_mgmt_msg_fpc_decoder = proto_register_protocol ( + "WiMax FPC Message", /* name */ + "WiMax FPC (fpc)", /* short name */ + "fpc" /* abbrev */ + ); + + proto_register_field_array(proto_mac_mgmt_msg_fpc_decoder, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + } +} + +/* Decode FPC messages. */ +void dissect_mac_mgmt_msg_fpc_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint offset = 0; + guint i; + guint number_stations; + guint tvb_len, payload_type; + proto_item *fpc_item = NULL; + proto_tree *fpc_tree = NULL; + gint8 value; + gfloat power_change; + + /* Ensure the right payload type */ + payload_type = tvb_get_guint8(tvb, 0); + if(payload_type != MAC_MGMT_MSG_FPC) + { + return; + } + + if (tree) + { /* we are being asked for details */ + + /* Get the tvb length */ + tvb_len = tvb_length(tvb); + /* display MAC payload type FPC */ + fpc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_fpc_decoder, tvb, 0, tvb_len, "MAC Management Message, FPC (38)"); + /* add MAC FPC subtree */ + fpc_tree = proto_item_add_subtree(fpc_item, ett_mac_mgmt_msg_fpc_decoder); + /* display the Message Type */ + proto_tree_add_item(fpc_tree, hf_fpc_message_type, tvb, offset, 1, FALSE); + offset ++; + /* display the Number of stations */ + proto_tree_add_item(fpc_tree, hf_fpc_number_of_stations, tvb, offset, 1, FALSE); + + number_stations = tvb_get_guint8(tvb, offset); + offset++; + for (i = 0; i < number_stations; i++ ) { + /* display the Basic CID*/ + proto_tree_add_item(fpc_tree, hf_fpc_basic_cid, tvb, offset, 2, FALSE); + offset += 2; + + /* display the Power adjust value */ + value = (gint8)tvb_get_guint8(tvb, offset); + power_change = (float)0.25 * value; /* 0.25dB incr */ + + /* display the Power adjust value in dB */ + proto_tree_add_float_format_value(fpc_tree, hf_fpc_power_adjust, tvb, offset, 1, power_change, " %.2f dB", power_change); + offset++; + + /* display the Power measurement frame */ + proto_tree_add_item(fpc_tree, hf_fpc_power_measurement_frame, tvb, offset, 1, FALSE); + offset++; + + if ( offset >= tvb_len ) { + break; + } + } + } +} + |